DS Interview Tips & Complete Cheat Sheet — How to Perform on the Day

This is not a guide that introduces new concepts. It's the guide you read the night before and skim the morning of — everything from the other four guides in one tight, scannable reference.

Part 1 — Interview Tips:

✅ Anatomy of the 45-minute technical screen — how time is distributed across SQL, A/B testing, stats, and product sense ✅ The 3 things that separate good from great — clarify first, think out loud, close with a recommendation

✅ How to handle questions you are not sure about without bluffing

✅ How to manage 45 minutes without over-investing in one question

✅ The Q&A — 5 sharp questions that work, and what to avoid

Part 2 — Complete Cheat Sheets:

✅ SQL — pre-submit checklist, core patterns, most common mistakes

✅ A/B Testing — full design sequence, key terms with "say this / never say this", pitfalls table

✅ Statistics — 15 concepts with one-line definitions, the p = 0.051 model answer

✅ Product & Business Sense — metric drop sequence, metric design, RICE, causal vs predictive, 4-sided marketplace

✅ The night before and morning of — exactly what to do

17 pages. The one to read last.